Parallel Joint Transform Correlator Applied to Devanagari Script Recognition
Applied Optics, Vol. 37, Issue 23, pp. 5408-5415 (1998)
http://dx.doi.org/10.1364/AO.37.005408
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Abstract
A novel, to our knowledge, scheme for a parallel joint transform correlator system is demonstrated by the introduction of a five-channel zone-plate image multiplicator combined with photographic referencing and is applied to the recognition of Devanagari script. For considering the script’s specific features, a partial image was obtained by means of windowing with 25 × 25 pixels out of a 64 × 64 pixel image of full-size characters and was employed for correlation. A comprehensive measurement of all 38 fundamental characters, namely, 1444 correlation pairs, showed satisfactory discrimination performance.
© 1998 Optical Society of America
OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(100.0100) Image processing : Image processing
(100.1160) Image processing : Analog optical image processing
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(110.4190) Imaging systems : Multiple imaging
Citation
Roshan Thapliya, Hirokazu Koizumi, Kashiko Kodate, and Takeshi Kamiya, "Parallel Joint Transform Correlator Applied to Devanagari Script Recognition," Appl. Opt. 37, 5408-5415 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-23-5408
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